These images are a key to the the degree blocks that contain the indices to the USGS 7½' (24K) maps. Point and click on the area of interest.
Degree blocks for west half of Montana
Degree blocks for east half of Montana
Montana (State) topographic map — Shows counties, location and names of all cities and towns, railroads, township and range lines, rivers and water features, highways, contours, national parks, forests, monuments, wildlife refuges and Indian Reservations (by color pattern). 1965. Scale 1:500,000
Montana (State) base map — Shows counties, location and names of all cities and towns and most of the smaller settlements, railroads, and township and range lines (black), water features (blue), 1983 (Revised) Scale 1:500,000. This map does not show contours.
Montana (State) base map. Same features as Misc-1, but published in black and white. Scale 1:1,000,000
Montana relief map. Overprinted on a modified base map which shows state and county boundaries, railroads, cities, towns and county seats (black), water features (blue). The physical features are highlighted by shaded relief in color, 1965. Scale 1:1,000,000. The map does not show contours.
Topographic map of Yellowstone National Park. 1961. Scale 1:125,000
Topographic map of Glacier National Park. 1968. Scale 1:100,000